CN102155610B - Low-temperature medium liquefaction device - Google Patents
Low-temperature medium liquefaction device Download PDFInfo
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- CN102155610B CN102155610B CN 201110040661 CN201110040661A CN102155610B CN 102155610 B CN102155610 B CN 102155610B CN 201110040661 CN201110040661 CN 201110040661 CN 201110040661 A CN201110040661 A CN 201110040661A CN 102155610 B CN102155610 B CN 102155610B
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- dewar
- liquid collecting
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- sleeve pipe
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Abstract
The invention relates to a low-temperature medium liquefaction device which comprises a Dewar and a heat exchange assembly, wherein the heat exchange assembly comprises a heat exchanger, a sleeve, a refrigerator cold head, a collector tube and a transmission tube; the upper end of the sleeve is hermetically and fixedly connected to the upper part of an inner cavity of the Dewar, and the lower end of the sleeve is hermetically and fixedly communicated with the collector tube; one end of the transmission tube is hermetically and fixedly communicated with the lower part of the collector tube, the middle part of the transmission tube is hermetically and fixedly connected with the Dewar, and the other end of the transmission tube is communicated to a cooled object outside the Dewar; the upper part of the refrigerator cold head is hermetically and fixedly connected with the Dewar, the lower part of the refrigerator cold head is arranged in the inner cavity of the sleeve, and the lower end of the refrigerator cold head is connected with the heat exchanger. The low-temperature medium liquefaction device disclosed by the invention has the advantages that: the heat transfer area at the low-temperature end of the refrigerator cold head is fully utilized, the heat leakage quantity is reduced, the working efficiency is improved, the energy resources are saved, the convenience for assembly and disassembly is achieved, and the manufacturing and maintaining cost is reduced.
Description
Technical field
The present invention relates to a kind of cryogenic media liquefaction plant, be specially adapted to utilize the situation of separate unit or many integrated liquefaction cryogenic medias of refrigerator, belong to the liquefaction technology field.
Background technique
The refrigerator integrated technology of existing technology is mainly taked dual mode; First kind is: the refrigerator cold head is placed in a vacuum; The terminal heat exchanger that connects of refrigerator cold head; The container welding at heat exchanger and cryogenic media (like liquid neon, liquid hydrogen) place utilizes heat exchanger to the cooling of the cryogenic media in container liquefaction; Second kind is that the refrigerator cold head is positioned in the wide-mouth Dewar inner bag, and the cryogenic liquide medium is at wide-mouth Dewar inner bag bottom, and gaseous medium is distributed in inner bag top, and the refrigerator cold head directly contacts with the gaseous state cryogenic media, and wide-mouth Dewar top adopts protective shield of radiation heat insulation.First kind of structure major defect is: (1) refrigerator cold head low-temperature end bottom surface transmits cold to cooling medium through cold header heat exchanger, but the low-temperature end side all is in the vacuum environment, and this part heat transfer area does not utilize; (2) because the refrigerator cold head is in the vacuum environment, the I&M dismounting of refrigerator cold head is very inconvenient.The Dewar vacuum is destroyed during the cold head dismounting, need do vacuumizing processing after reinstalling again at every turn, the long and complex process of finding time because of the pumpdown time, and this brings very big inconvenience for the maintenance operation of cryogenic media liquefaction plant.Second kind of structure major defect is: wide-mouth Dewar neck tube bore is excessive, forms natural convection easily, causes that Lou heat is bigger, and simultaneously, the Dewar intracavity space is big, has increased the air demand of cryogenic media.
Summary of the invention
The objective of the invention is to, overcome the existing technology shortcoming, a kind of heat transfer area that had both made full use of refrigerator cold head low-temperature end is provided; And reduce leaking heat; Increase work efficiency and energy saving, be easy for installation and removal again, reduce the cryogenic media liquefaction plant of manufacturing and maintenance cost.
Technological scheme of the present invention is: a kind of cryogenic media liquefaction plant comprises Dewar and heat-exchanging component; Said heat-exchanging component comprises heat exchanger, sleeve pipe, refrigerator cold head, liquid collecting pipe, transport tube; Said sleeve pipe upper end is sealedly and fixedly connected on Dewar inner chamber top lower end and liquid collecting pipe sealing and fixing UNICOM; Said transport tube one end and liquid collecting pipe lower seal be UNICOM fixedly, and middle part and Dewar are sealedly and fixedly connected, and the other end leads to the Dewar outside; The top and the Dewar of refrigerator cold head are sealedly and fixedly connected, and the bottom is in the inner chamber of sleeve pipe, and the lower end connects a heat exchanger; Said heat exchanger inserts in the liquid collecting pipe; The inwall of sleeve pipe and liquid collecting pipe and transport tube and refrigerator cold head outer wall constitute the cryogenic media zone; The outer wall of sleeve pipe and liquid collecting pipe and transport tube and the inwall of Dewar and flange constitute vacuum area.
Further technological scheme is:
Described cryogenic media liquefaction plant, a flange is arranged at its Dewar top, and Socket welding is connected on the flange.
Described cryogenic media liquefaction plant, the top of its refrigerator cold head and Dewar fixed seal connection are to be connected on the flange of Dewar with bolt; The Sealing of fixed seal connection is " O " shape seal ring rubber or metal between refrigerator cold head and the flange junction surface.
Described cryogenic media liquefaction plant, it is the vacuum sandwich pipe that is used to reduce to leak heat that its transport tube has one section pipe in the outside part of Dewar; This vacuum sandwich pipe outer wall and Dewar welding.
One section the outer wall that described cryogenic media liquefaction plant, the outer wall of its sleeve pipe and liquid collecting pipe and transport tube are arranged in vacuum area has thermal-protective coating.
Described cryogenic media liquefaction plant has the gap between its internal surface of sleeve pipe and the refrigerator cold head, and this gap is less than 2.5 millimeters; Sleeve outer wall wraps up or scribbles the thermal-protective coating that thermal-protective material is processed.
Described cryogenic media liquefaction plant, its liquid collecting pipe laterally or vertically are welded on the sleeve pipe below; Connection mouth on the liquid collecting pipe of laterally installing is at upper side; Connection mouth on the vertical liquid collecting pipe of installing is on the upper-end surface.
Described cryogenic media liquefaction plant, its transport tube are single tube, and promptly liquid state and gaseous state cryogenic media transmit in same pipe.
Described cryogenic media liquefaction plant, its transport tube are two-tube, and promptly liquid state and gaseous state cryogenic media transmit in passage separately respectively.
A kind of integrated cryogenic media liquefaction plant with a plurality of heat-exchanging components comprises 1 Dewar and at least 2 heat-exchanging components; Each heat-exchanging component comprises 1 heat exchanger and 1 sleeve pipe and l refrigerator cold head; Each heat-exchanging component has 1 liquid collecting pipe, also total transport tube; Said sleeve pipe upper end is sealedly and fixedly connected on Dewar inner chamber top lower end and liquid collecting pipe sealing and fixing UNICOM; Said transport tube one end and liquid collecting pipe lower seal be UNICOM fixedly, and middle part and Dewar are sealedly and fixedly connected, and the other end leads to the Dewar outside; The top and the Dewar of each refrigerator cold head are sealedly and fixedly connected, and the bottom is in the inner chamber of sleeve pipe, and the lower end connects a heat exchanger; Said heat exchanger inserts in the liquid collecting pipe; The inner chamber of sleeve pipe and liquid collecting pipe and transport tube is formed the cryogenic media zone; Constitute vacuum area between the outer wall of sleeve pipe and liquid collecting pipe and transport tube and the inwall of Dewar.
Principle of the present invention with effect is: 1, the refrigerator cold head is installed in the sleeve pipe and directly contacts with cryogenic media; Help making full use of of refrigerator cold head low-temperature end area; Be in the structural type of vacuum than the refrigerator cold head; When the design of heat exchanger structure of refrigerator cold head is identical, have a narrow range of temperature between this kind form cooling medium and the refrigerator cold head.When 2, the refrigerator cold head is installed, only need the refrigerator cold head is inserted in the sleeve pipe, the connecting bolt between fastening then refrigerator cold head and the Dewar flange gets final product; When needs are dismantled, only need connecting bolt is screwed out, just can directly upwards take out the refrigerator cold head, in a word, remove and install operation and do not destroy the Dewar vacuum, very convenient.3, matching gap is as far as possible little between casing inner diameter and the refrigerator cold head external diameter, can avoid the convection heat exchange between sleeve pipe internal upper part normal temperature medium and the bottom cryogenic media like this, thereby simultaneously because the little conductive heat leakage that reduced of casing diameter.
Description of drawings
Fig. 1 is a cryogenic media liquefaction plant master TV structure partial schematic sectional view of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1 and Fig. 4;
Fig. 3 is the M place enlarged view of Fig. 2 and Fig. 4;
Fig. 4 is the integrated cryogenic media liquefaction plant master TV structure partial schematic sectional view with 2 heat-exchanging components;
Fig. 5 is the B-B cross sectional representation of Fig. 4;
Fig. 6 is the horizontal cross-sectional schematic of integrated cryogenic media liquefaction plant with 3 heat-exchanging components.
The name that sign is corresponding in each accompanying drawing is called: 1-Dewar, 2-heat exchanger, 3-sleeve pipe, 4-refrigerator cold head; 5-Dewar upper flange, 6-vacuum area, 7-liquid collecting pipe, 7.1-connection mouth; 8-transport tube, 9-cryogenic media zone, 10-seal ring.
Specific embodiments
In conjunction with accompanying drawing and embodiment the present invention is described further as follows:
Embodiment 1:Like Fig. 1,2, shown in 3: a kind of cryogenic media liquefaction plant has a Dewar 1 and heat-exchanging component; Said heat-exchanging component has heat exchanger 2, sleeve pipe 3, refrigerator cold head 4, liquid collecting pipe 7, transport tube 8; Wherein Dewar 1, sleeve pipe 3, liquid collecting pipe 7 and transport tube 8 all can be made with stainless steel pipe, and heat exchanger 2 is used high thermal conductivity materials, make like red copper.Said sleeve pipe 3 upper ends are sealedly and fixedly connected on Dewar 1 inner chamber top, lower end and liquid collecting pipe 7 sealing and fixing UNICOMs; Said transport tube 8 one ends and liquid collecting pipe 7 lower seal are UNICOM fixedly, and middle part and Dewar 1 are sealedly and fixedly connected, and the other end leads to Dewar 1 outside; Refrigerator cold head 4 is selected GM refrigerator cold head for use, and its top and Dewar 1 are sealedly and fixedly connected, and the bottom is in the inner chamber of sleeve pipe 3, and the lower end connects a heat exchanger 2; Said heat exchanger 2 inserts in the liquid collecting pipe 7; The inwall of sleeve pipe 3 and liquid collecting pipe 7 and transport tube 8 and refrigerator cold head 4 outer walls constitute cryogenic media zone 9; The outer wall of sleeve pipe 3 and liquid collecting pipe 7 and transport tube 8 and the inwall of Dewar 1 and flange 5 constitute vacuum area 6.A flange 5 is arranged at Dewar 1 top, and sleeve pipe 3 is welded on the flange 5.The top of refrigerator cold head 4 and Dewar 1 fixed seal connection are to be connected on the flange 5 of Dewar 1 with bolt; The Sealing of fixed seal connection is the seal ring 10 of " O " shape rubber between refrigerator cold head 4 and flange 5 junction surfaces.It is the vacuum sandwich pipe that is used to reduce to leak heat that transport tube 8 has one section pipe in Dewar 1 outside part; This vacuum sandwich pipe outer wall and Dewar 1 welding.The outer wall of sleeve pipe 3 and liquid collecting pipe 7 and one section the outer wall that transport tube 8 is arranged in vacuum area 6 have thermal-protective coating, and present embodiment is the multilayer insulation layer that two-sided aluminium plating terylene film and glass fiber cloth are processed.Said sleeve pipe 3 should have certain length, and wall thickness is generally got between 0.5-1 millimeter in that satisfy should be thin as far as possible under the prerequisite of force request.Sleeve pipe 3 internal diameters are installed under the easy prerequisite as far as possible little at assurance refrigerator cold head 4, have the gap between sleeve pipe 3 inwalls and the refrigerator cold head 4, and this gap is less than 2.5 millimeters, and present embodiment is elected 1 millimeter as; Sleeve pipe 3 outer walls are enclosed with the thermal-protective coating that thermal-protective material is processed, and present embodiment is the thermal-protective coating that ten layers of two-sided aluminium plating terylene film and glass fiber cloth are processed, and also can be the thermal-protective coatings of coating.Liquid collecting pipe 7 laterally or vertically be welded on sleeve pipe 3 belows, present embodiment is horizontal installation, the connection mouth 7.1 on the liquid collecting pipe 7 is at upper side; Transport tube 8 is a single tube, and promptly liquid state and gaseous state cryogenic media transmit in same pipe.Transport tube 8 also can be for two-tube, and promptly liquid state and gaseous state cryogenic media transmit in passage separately respectively.
Embodiment 2:Different with embodiment 1 is that " O " shape seal ring 10 between its refrigerator cold head 4 and flange 5 junction surfaces is a metal o-ring; Between vacuum area 6 its space inwalls and Dewar 1 outer wall multilayer insulation layer is arranged all; The thermal-protective coating that sleeve pipe 3 outer walls have thermal-protective material to process, present embodiment are the thermal-protective coatings that ten layers of two-sided aluminium plating terylene film and glass fiber cloth are processed; Liquid collecting pipe 7 is vertically installed, and connection mouth 7.1 is on the upper-end surface; Having the gap between sleeve pipe 3 inwalls and the refrigerator cold head 4 is 0.5 millimeter.
Embodiment 3:Like Fig. 2,3, shown in 4, different with embodiment 1 is: for a kind of integrated cryogenic media liquefaction plant with 2 heat-exchanging components, 1 Dewar 1 and 2 heat-exchanging components are arranged; Each heat-exchanging component comprises 1 heat exchanger 2 and 1 sleeve pipe 3 and l refrigerator cold head 4; Each heat-exchanging component has 1 liquid collecting pipe 7, also total transport tube 8; Said sleeve pipe 3 upper ends are sealedly and fixedly connected on Dewar 1 inner chamber top, lower end and liquid collecting pipe 7 sealing and fixing UNICOMs; Said transport tube 8 one ends and liquid collecting pipe 7 lower seal are UNICOM fixedly, and middle part and Dewar 1 are sealedly and fixedly connected, and the other end leads to Dewar 1 outside; The top of each refrigerator cold head 4 and Dewar 1 are sealedly and fixedly connected, and the bottom is in the inner chamber of sleeve pipe 3, and the lower end connects a heat exchanger 2; Said heat exchanger 2 inserts in the liquid collecting pipe 7; The inner chamber of sleeve pipe 3 and liquid collecting pipe 7 and transport tube 8 is formed cryogenic media zone 9; Constitute vacuum area 6 between the outer wall of sleeve pipe 3 and liquid collecting pipe 7 and transport tube 8 and the inwall of Dewar 1; Having the gap between sleeve pipe 3 inwalls and the refrigerator cold head 4 is 2.5 millimeters.
Embodiment 4:Like Fig. 2,3, shown in 5, different with embodiment 3 is: for a kind of integrated cryogenic media liquefaction plant with 3 heat-exchanging components, 1 Dewar 1 is arranged promptly, 3 heat-exchanging components are arranged in it; Having the gap between sleeve pipe 3 inwalls and the refrigerator cold head 4 is 1.5 millimeters.
Manufacturing process of the present invention, principle are explained as follows: earlier the heat exchanger that processes 2 is installed in refrigerator cold head 4 lower ends, then refrigerator cold head 4 is inserted in the sleeve pipe.Heat exchanger 2 designs should have enough heat exchange areas; Make between refrigerator cold head 4 and the cryogenic media heat transfer temperature difference as far as possible little; Simultaneously, the weight of heat exchanger 2 must satisfy the requirement (general refrigerator cold head 4 all stipulated maximum bear weight) of 4 pairs of weight of refrigerator cold head.Heat exchanger 2 all places in the liquid collecting pipe 7; Refrigerator cold head 4 directly contacts with cryogenic media; The gaseous state cryogenic media is condensation liquefaction on heat exchanger 2, and condensed liquid sub medium pools together because of action of gravity, is transported to the Dewar 1 outside object that is cooled through transport tube 8.Transport tube 8 is a bushing type, and promptly skin is a vacuum sandwich, and inside is to carry gas-liquid attitude cryogenic media pipeline.Heat is taken away in the liquid steam raising, and the gaseous state cryogenic media is again in transport tube 8 is got back to liquid collecting pipe 7, again through 4 liquefaction of refrigerator cold head, circulation so repeatedly then.In the course of the work, when transport tube 8 is single tube, existing gaseous state in its pipeline, also have liquid cryogenic media to pass through, and flow on the contrary, therefore, transport tube 8 be the only suitable less workplace of cryogenic media flow of the technological scheme of single tube; When flow is big, should use two-tube transmission, promptly a pipe is walked liquid, and another root pipe is walked gas.
Claim protection domain of the present invention is not limited to the foregoing description.
Claims (10)
1. a cryogenic media liquefaction plant is characterized in that: comprise Dewar (1) and heat-exchanging component; Said heat-exchanging component comprises heat exchanger (2), sleeve pipe (3), refrigerator cold head (4), liquid collecting pipe (7), transport tube (8); Said sleeve pipe (3) upper end is sealedly and fixedly connected on Dewar (1) inner chamber top lower end and liquid collecting pipe (7) sealing and fixing UNICOM; Said transport tube (8) one ends and liquid collecting pipe (7) lower seal be UNICOM fixedly, and middle part and Dewar (1) are sealedly and fixedly connected, and the other end leads to Dewar (1) outside; The top of refrigerator cold head (4) and Dewar (1) are sealedly and fixedly connected, and the bottom is in the inner chamber of sleeve pipe (3), and the lower end connects a heat exchanger (2); Said heat exchanger (2) inserts in the liquid collecting pipe (7); Sleeve pipe (3) and liquid collecting pipe (7) and transport tube (8) three's inwall and refrigerator cold head (4) outer wall constitute cryogenic media zone (9); Sleeve pipe (3) and liquid collecting pipe (7) and transport tube (8) three's the outer wall and the inwall of Dewar (1) and flange (5) constitute vacuum area (6).
2. cryogenic media liquefaction plant as claimed in claim 1 is characterized in that: a flange (5) is arranged at Dewar (1) top, and sleeve pipe (3) is welded on the flange (5).
3. cryogenic media liquefaction plant as claimed in claim 1 is characterized in that: the top of refrigerator cold head (4) and Dewar (1) fixed seal connection are to be connected on the flange (5) of Dewar (1) with bolt; The Sealing of fixed seal connection is " O " shape seal ring rubber or metal (10) between refrigerator cold head (4) and flange (5) junction surface.
4. cryogenic media liquefaction plant as claimed in claim 1 is characterized in that: it is the vacuum sandwich pipe that is used to reduce to leak heat that transport tube (8) has one section pipe in the outside part of Dewar (1); This vacuum sandwich pipe outer wall and Dewar (1) welding.
5. cryogenic media liquefaction plant as claimed in claim 1 is characterized in that: one section the outer wall that the outer wall of the outer wall of sleeve pipe (3) and liquid collecting pipe (7) and transport tube (8) are arranged in vacuum area (6) has thermal-protective coating.
6. cryogenic media liquefaction plant as claimed in claim 1 is characterized in that: have the gap between said sleeve pipe (3) inwall and the refrigerator cold head (4); Sleeve pipe (3) outer wall wraps up or scribbles the thermal-protective coating that multilayer insulation material is processed.
7. cryogenic media liquefaction plant as claimed in claim 1 is characterized in that: said liquid collecting pipe (7) laterally or vertically is welded on sleeve pipe (3) below; Connection mouth (7.1) on the liquid collecting pipe of laterally installing (7) is at upper side; Connection mouth (7.1) on the vertical liquid collecting pipe of installing (7) is on the upper-end surface.
8. cryogenic media liquefaction plant as claimed in claim 1 is characterized in that: described transport tube (8) is the single tube that liquid state and gaseous state cryogenic media transmit in same pipe.
9. cryogenic media liquefaction plant as claimed in claim 1 is characterized in that: described transport tube (8) for liquid state and gaseous state cryogenic media in passage separately, transmit respectively two-tube.
10. the integrated cryogenic media liquefaction plant with a plurality of heat-exchanging components is characterized in that, comprises 1 Dewar (1) and at least 2 heat-exchanging components; Each heat-exchanging component comprises 1 heat exchanger (2) and 1 sleeve pipe (3) and l refrigerator cold head (4); Each heat-exchanging component has 1 liquid collecting pipe (7), also total transport tube (8); Said sleeve pipe (3) upper end is sealedly and fixedly connected on Dewar (1) inner chamber top lower end and liquid collecting pipe (7) sealing and fixing UNICOM; Said transport tube (8) one ends and liquid collecting pipe (7) lower seal be UNICOM fixedly, and middle part and Dewar (1) are sealedly and fixedly connected, and the other end leads to Dewar (1) outside; The top of each refrigerator cold head (4) and Dewar (1) are sealedly and fixedly connected, and the bottom is in the inner chamber of sleeve pipe (3), and the lower end connects a heat exchanger (2); Said heat exchanger (2) inserts in the liquid collecting pipe (7); Sleeve pipe (3) and liquid collecting pipe (7) and transport tube (8) three's inner chamber is formed cryogenic media zone (9); Constitute vacuum area (6) between sleeve pipe (3) and liquid collecting pipe (7) and transport tube (8) three's the outer wall and the inwall of Dewar (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110040661 CN102155610B (en) | 2011-02-19 | 2011-02-19 | Low-temperature medium liquefaction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110040661 CN102155610B (en) | 2011-02-19 | 2011-02-19 | Low-temperature medium liquefaction device |
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| Publication Number | Publication Date |
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| CN102155610A CN102155610A (en) | 2011-08-17 |
| CN102155610B true CN102155610B (en) | 2012-07-18 |
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| CN 201110040661 Active CN102155610B (en) | 2011-02-19 | 2011-02-19 | Low-temperature medium liquefaction device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063994B (en) * | 2011-10-20 | 2015-05-20 | 徐敏 | High vacuum test container and medium discharge test device comprising the same |
| CN102564066B (en) * | 2012-02-10 | 2013-10-16 | 南京柯德超低温技术有限公司 | Low-temperature device for separating and purifying gas based on small-sized low-temperature refrigerating machine |
| CN104535344B (en) * | 2014-12-09 | 2017-05-03 | 中国科学院上海技术物理研究所 | Standard Duvel for measuring refrigeration performance of linear type pulse tube refrigerating machines and manufacturing method |
| CN115388615B (en) * | 2022-04-19 | 2023-11-24 | 北京师范大学 | Argon liquefaction system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4645931A (en) * | 1985-03-15 | 1987-02-24 | Honeywell Inc. | Detector dewar assembly |
| JP2002076453A (en) * | 2000-08-31 | 2002-03-15 | Hitachi Ltd | Weak magnetic field measuring dewar |
| CN2711723Y (en) * | 2004-06-22 | 2005-07-20 | 中国科学院上海技术物理研究所 | Low temperature composite Dewar |
| CN2718568Y (en) * | 2004-06-22 | 2005-08-17 | 中国科学院上海技术物理研究所 | Dewar with micro-refrigerator |
-
2011
- 2011-02-19 CN CN 201110040661 patent/CN102155610B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4645931A (en) * | 1985-03-15 | 1987-02-24 | Honeywell Inc. | Detector dewar assembly |
| JP2002076453A (en) * | 2000-08-31 | 2002-03-15 | Hitachi Ltd | Weak magnetic field measuring dewar |
| CN2711723Y (en) * | 2004-06-22 | 2005-07-20 | 中国科学院上海技术物理研究所 | Low temperature composite Dewar |
| CN2718568Y (en) * | 2004-06-22 | 2005-08-17 | 中国科学院上海技术物理研究所 | Dewar with micro-refrigerator |
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